Alert archive / Montana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 15, NWS Great Falls, MT

June 5, 1997Broadwater County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 5, 1997, 6:34 PM MDT for Broadwater County, Montana. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 5, 1997, 6:34 PM MDT (00:34 UTC)
Expired
Jun 5, 1997, 7:15 PM MDT
In force
41 min
Issued by
NWS Great Falls, MT
Area
Whole counties

County Broadwater County, MT

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 5, 5:45 PM MDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 0.6 hours before the alert went out and 143 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Great_falls, MT at 00:00Z on 1997-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 30 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Great_falls, MT at 00:00Z on 1997-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -71 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
30 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
1272 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
-71 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KGTF 060037
SVRGTF
MTC007-060115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
634 PM MDT THU JUN 5 1997
 
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST MONTANA
 
   ...CENTRAL AND NORTHERN BROADWATER COUNTY
 
AT 630PM MDT DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER CENTRAL
BROADWATER COUNTY...OVER TOWNSEND...MOVING NORTHEAST AT 25 MPH. LARGE HA
HEAVY RAIN AND DAMAGING WINDS WERE LIKELY WITH THIS THUNDERSTORM.

The office that day

Everything else NWS Great Falls, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 6, 2:55 PM MDTSevere Thunderstorm WarningTFXLewis and Clark50 min
Jun 6, 3:45 PM MDTSevere Thunderstorm WarningTFXLewis and Clark45 min
Jun 6, 4:03 PM MDTSevere Thunderstorm WarningTFXCascade57 min
Jun 6, 4:19 PM MDTSevere Thunderstorm WarningTFXChouteau, Judith Basin56 min
Jun 6, 4:38 PM MDTSevere Thunderstorm WarningTFXCascade67 min
Jun 6, 5:15 PM MDTSevere Thunderstorm WarningTFXBlaine, Chouteau, Fergus60 min
Jun 6, 5:31 PM MDTSevere Thunderstorm WarningTFXCascade, Chouteau, Judith Basin, Meagher59 min
Jun 6, 5:52 PM MDTSevere Thunderstorm WarningTFXYellowstone68 min

Nearby

Severe Thunderstorm Warnings in Montana, 1997Every severe thunderstorm warning in 1997

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.